1 /* GIMP - The GNU Image Manipulation Program
2 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18 #include "config.h"
19
20 #include <gdk-pixbuf/gdk-pixbuf.h>
21 #include <gegl.h>
22
23 #include "libgimpbase/gimpbase.h"
24
25 #include "core-types.h"
26
27 #include "gimpboundary.h"
28 #include "gimpdrawable-filters.h"
29 #include "gimpdrawable-floating-selection.h"
30 #include "gimperror.h"
31 #include "gimpimage.h"
32 #include "gimpimage-undo.h"
33 #include "gimpimage-undo-push.h"
34 #include "gimplayer.h"
35 #include "gimplayer-floating-selection.h"
36 #include "gimplayermask.h"
37
38 #include "gimp-intl.h"
39
40
41 /* public functions */
42
43 void
floating_sel_attach(GimpLayer * layer,GimpDrawable * drawable)44 floating_sel_attach (GimpLayer *layer,
45 GimpDrawable *drawable)
46 {
47 GimpImage *image;
48 GimpLayer *floating_sel;
49 GimpLayer *parent = NULL;
50 gint position = 0;
51
52 g_return_if_fail (GIMP_IS_LAYER (layer));
53 g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
54 g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
55 g_return_if_fail (drawable != GIMP_DRAWABLE (layer));
56 g_return_if_fail (gimp_item_get_image (GIMP_ITEM (layer)) ==
57 gimp_item_get_image (GIMP_ITEM (drawable)));
58
59 image = gimp_item_get_image (GIMP_ITEM (drawable));
60
61 floating_sel = gimp_image_get_floating_selection (image);
62
63 /* If there is already a floating selection, anchor it */
64 if (floating_sel)
65 {
66 floating_sel_anchor (floating_sel);
67
68 /* if we were pasting to the old floating selection, paste now
69 * to the drawable
70 */
71 if (drawable == (GimpDrawable *) floating_sel)
72 drawable = gimp_image_get_active_drawable (image);
73 }
74
75 gimp_layer_set_lock_alpha (layer, TRUE, FALSE);
76
77 gimp_layer_set_floating_sel_drawable (layer, drawable);
78
79 /* Floating selection layer placement, default to the top of the
80 * layers stack; parent and position are adapted according to the
81 * drawable associated with the floating selection.
82 */
83
84 if (GIMP_IS_LAYER_MASK (drawable))
85 {
86 GimpLayer *tmp = gimp_layer_mask_get_layer (GIMP_LAYER_MASK (drawable));
87
88 parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (tmp)));
89 position = gimp_item_get_index (GIMP_ITEM (tmp));
90 }
91 else if (GIMP_IS_LAYER (drawable))
92 {
93 parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (drawable)));
94 position = gimp_item_get_index (GIMP_ITEM (drawable));
95 }
96
97 gimp_image_add_layer (image, layer, parent, position, TRUE);
98 }
99
100 void
floating_sel_anchor(GimpLayer * layer)101 floating_sel_anchor (GimpLayer *layer)
102 {
103 GimpImage *image;
104 GimpDrawable *drawable;
105 GimpFilter *filter = NULL;
106 GeglRectangle bounding_box;
107 GeglRectangle dr_bounding_box;
108 gint off_x, off_y;
109 gint dr_off_x, dr_off_y;
110
111 g_return_if_fail (GIMP_IS_LAYER (layer));
112 g_return_if_fail (gimp_layer_is_floating_sel (layer));
113
114 /* Don't let gimp_image_remove_layer free the layer while we still need it */
115 g_object_ref (layer);
116
117 image = gimp_item_get_image (GIMP_ITEM (layer));
118
119 gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_ANCHOR,
120 C_("undo-type", "Anchor Floating Selection"));
121
122 drawable = gimp_layer_get_floating_sel_drawable (layer);
123
124 gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y);
125 gimp_item_get_offset (GIMP_ITEM (drawable), &dr_off_x, &dr_off_y);
126
127 bounding_box = gimp_drawable_get_bounding_box (GIMP_DRAWABLE (layer));
128 dr_bounding_box = gimp_drawable_get_bounding_box (drawable);
129
130 bounding_box.x += off_x;
131 bounding_box.y += off_y;
132
133 dr_bounding_box.x += dr_off_x;
134 dr_bounding_box.y += dr_off_y;
135
136 if (gimp_item_get_visible (GIMP_ITEM (layer)) &&
137 gegl_rectangle_intersect (NULL, &bounding_box, &dr_bounding_box))
138 {
139 filter = gimp_drawable_get_floating_sel_filter (drawable);
140 }
141
142 if (filter)
143 {
144 gimp_drawable_merge_filter (drawable, filter, NULL, NULL,
145 NULL, FALSE, FALSE, FALSE);
146 }
147
148 gimp_image_remove_layer (image, layer, TRUE, NULL);
149
150 gimp_image_undo_group_end (image);
151
152 /* invalidate the boundaries */
153 gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (gimp_image_get_mask (image)));
154
155 g_object_unref (layer);
156 }
157
158 gboolean
floating_sel_to_layer(GimpLayer * layer,GError ** error)159 floating_sel_to_layer (GimpLayer *layer,
160 GError **error)
161 {
162 GimpItem *item;
163 GimpImage *image;
164
165 g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
166 g_return_val_if_fail (gimp_layer_is_floating_sel (layer), FALSE);
167 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
168
169 item = GIMP_ITEM (layer);
170 image = gimp_item_get_image (item);
171
172 /* Check if the floating layer belongs to a channel */
173 if (GIMP_IS_CHANNEL (gimp_layer_get_floating_sel_drawable (layer)))
174 {
175 g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
176 _("Cannot create a new layer from the floating "
177 "selection because it belongs to a layer mask "
178 "or channel."));
179 return FALSE;
180 }
181
182 gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_TO_LAYER,
183 C_("undo-type", "Floating Selection to Layer"));
184
185 gimp_image_undo_push_fs_to_layer (image, NULL, layer);
186
187 gimp_drawable_detach_floating_sel (gimp_layer_get_floating_sel_drawable (layer));
188 gimp_layer_set_floating_sel_drawable (layer, NULL);
189
190 gimp_item_set_visible (item, TRUE, TRUE);
191 gimp_layer_set_lock_alpha (layer, FALSE, TRUE);
192
193 gimp_image_undo_group_end (image);
194
195 /* When the floating selection is converted to/from a normal layer
196 * it does something resembling a name change, so emit the
197 * "name-changed" signal
198 */
199 gimp_object_name_changed (GIMP_OBJECT (layer));
200
201 gimp_drawable_update (GIMP_DRAWABLE (layer),
202 0, 0,
203 gimp_item_get_width (item),
204 gimp_item_get_height (item));
205
206 return TRUE;
207 }
208
209 void
floating_sel_activate_drawable(GimpLayer * layer)210 floating_sel_activate_drawable (GimpLayer *layer)
211 {
212 GimpImage *image;
213 GimpDrawable *drawable;
214
215 g_return_if_fail (GIMP_IS_LAYER (layer));
216 g_return_if_fail (gimp_layer_is_floating_sel (layer));
217
218 image = gimp_item_get_image (GIMP_ITEM (layer));
219
220 drawable = gimp_layer_get_floating_sel_drawable (layer);
221
222 /* set the underlying drawable to active */
223 if (GIMP_IS_LAYER_MASK (drawable))
224 {
225 GimpLayerMask *mask = GIMP_LAYER_MASK (drawable);
226
227 gimp_image_set_active_layer (image, gimp_layer_mask_get_layer (mask));
228 }
229 else if (GIMP_IS_CHANNEL (drawable))
230 {
231 gimp_image_set_active_channel (image, GIMP_CHANNEL (drawable));
232 }
233 else
234 {
235 gimp_image_set_active_layer (image, GIMP_LAYER (drawable));
236 }
237 }
238
239 const GimpBoundSeg *
floating_sel_boundary(GimpLayer * layer,gint * n_segs)240 floating_sel_boundary (GimpLayer *layer,
241 gint *n_segs)
242 {
243 g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
244 g_return_val_if_fail (gimp_layer_is_floating_sel (layer), NULL);
245 g_return_val_if_fail (n_segs != NULL, NULL);
246
247 if (layer->fs.boundary_known == FALSE)
248 {
249 gint width, height;
250 gint off_x, off_y;
251
252 width = gimp_item_get_width (GIMP_ITEM (layer));
253 height = gimp_item_get_height (GIMP_ITEM (layer));
254 gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y);
255
256 if (layer->fs.segs)
257 g_free (layer->fs.segs);
258
259 if (gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
260 {
261 GeglBuffer *buffer;
262 gint i;
263
264 /* find the segments */
265 buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
266
267 layer->fs.segs = gimp_boundary_find (buffer, NULL,
268 babl_format ("A float"),
269 GIMP_BOUNDARY_WITHIN_BOUNDS,
270 0, 0, width, height,
271 GIMP_BOUNDARY_HALF_WAY,
272 &layer->fs.num_segs);
273
274 /* offset the segments */
275 for (i = 0; i < layer->fs.num_segs; i++)
276 {
277 layer->fs.segs[i].x1 += off_x;
278 layer->fs.segs[i].y1 += off_y;
279 layer->fs.segs[i].x2 += off_x;
280 layer->fs.segs[i].y2 += off_y;
281 }
282 }
283 else
284 {
285 layer->fs.num_segs = 4;
286 layer->fs.segs = g_new0 (GimpBoundSeg, 4);
287
288 /* top */
289 layer->fs.segs[0].x1 = off_x;
290 layer->fs.segs[0].y1 = off_y;
291 layer->fs.segs[0].x2 = off_x + width;
292 layer->fs.segs[0].y2 = off_y;
293
294 /* left */
295 layer->fs.segs[1].x1 = off_x;
296 layer->fs.segs[1].y1 = off_y;
297 layer->fs.segs[1].x2 = off_x;
298 layer->fs.segs[1].y2 = off_y + height;
299
300 /* right */
301 layer->fs.segs[2].x1 = off_x + width;
302 layer->fs.segs[2].y1 = off_y;
303 layer->fs.segs[2].x2 = off_x + width;
304 layer->fs.segs[2].y2 = off_y + height;
305
306 /* bottom */
307 layer->fs.segs[3].x1 = off_x;
308 layer->fs.segs[3].y1 = off_y + height;
309 layer->fs.segs[3].x2 = off_x + width;
310 layer->fs.segs[3].y2 = off_y + height;
311 }
312
313 layer->fs.boundary_known = TRUE;
314 }
315
316 *n_segs = layer->fs.num_segs;
317
318 return layer->fs.segs;
319 }
320
321 void
floating_sel_invalidate(GimpLayer * layer)322 floating_sel_invalidate (GimpLayer *layer)
323 {
324 g_return_if_fail (GIMP_IS_LAYER (layer));
325 g_return_if_fail (gimp_layer_is_floating_sel (layer));
326
327 /* Invalidate the attached-to drawable's preview */
328 gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimp_layer_get_floating_sel_drawable (layer)));
329
330 /* Invalidate the boundary */
331 layer->fs.boundary_known = FALSE;
332 }
333